This circuit was obtained from Elektor magazine and published in the Encyclopedia of Electronic Circuits Vol 5 of 1995. Transistors are RF types that are still common today.
August 2017 - The PIC32MM microcontrollers of the Microchip 32-Bit Family can be obtained from...
This circuit was found in a 80s American documentation. The zener diodes determine the points of...
This circuit monitors the state of a 12 V battery and can be used directly with one, or even in a...